EP4036744A1 - Anordnung von blockchains mit beschränkter transaktion - Google Patents

Anordnung von blockchains mit beschränkter transaktion Download PDF

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Publication number
EP4036744A1
EP4036744A1 EP19932269.4A EP19932269A EP4036744A1 EP 4036744 A1 EP4036744 A1 EP 4036744A1 EP 19932269 A EP19932269 A EP 19932269A EP 4036744 A1 EP4036744 A1 EP 4036744A1
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EP
European Patent Office
Prior art keywords
transaction
nodes
restricted
information
node
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP19932269.4A
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English (en)
French (fr)
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EP4036744B1 (de
EP4036744A4 (de
EP4036744C0 (de
Inventor
Alberto Miguel HERNANDEZ ACOSTA
Rubén NIETO MARTÍN-VARÉS
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Allfunds Blockchain SLU
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Allfunds Bank SA
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Publication date
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Publication of EP4036744A4 publication Critical patent/EP4036744A4/de
Application granted granted Critical
Publication of EP4036744B1 publication Critical patent/EP4036744B1/de
Publication of EP4036744C0 publication Critical patent/EP4036744C0/de
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    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q20/00—Payment architectures, schemes or protocols
    • G06Q20/30—Payment architectures, schemes or protocols characterised by the use of specific devices or networks
    • G06Q20/36—Payment architectures, schemes or protocols characterised by the use of specific devices or networks using electronic wallets or electronic money safes
    • G06Q20/367—Payment architectures, schemes or protocols characterised by the use of specific devices or networks using electronic wallets or electronic money safes involving electronic purses or money safes
    • G06Q20/3678—Payment architectures, schemes or protocols characterised by the use of specific devices or networks using electronic wallets or electronic money safes involving electronic purses or money safes e-cash details, e.g. blinded, divisible or detecting double spending
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q20/00—Payment architectures, schemes or protocols
    • G06Q20/02—Payment architectures, schemes or protocols involving a neutral party, e.g. certification authority, notary or trusted third party [TTP]
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q20/00—Payment architectures, schemes or protocols
    • G06Q20/04—Payment circuits
    • G06Q20/06—Private payment circuits, e.g. involving electronic currency used among participants of a common payment scheme
    • G06Q20/065—Private payment circuits, e.g. involving electronic currency used among participants of a common payment scheme using e-cash
    • G06Q20/0658—Private payment circuits, e.g. involving electronic currency used among participants of a common payment scheme using e-cash e-cash managed locally
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q20/00—Payment architectures, schemes or protocols
    • G06Q20/38—Payment protocols; Details thereof
    • G06Q20/383—Anonymous user system
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q20/00—Payment architectures, schemes or protocols
    • G06Q20/38—Payment protocols; Details thereof
    • G06Q20/389—Keeping log of transactions for guaranteeing non-repudiation of a transaction
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/06—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols the encryption apparatus using shift registers or memories for block-wise or stream coding, e.g. DES systems or RC4; Hash functions; Pseudorandom sequence generators
    • H04L9/0643—Hash functions, e.g. MD5, SHA, HMAC or f9 MAC
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/32—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
    • H04L9/3236—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials using cryptographic hash functions
    • H04L9/3239—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials using cryptographic hash functions involving non-keyed hash functions, e.g. modification detection codes [MDCs], MD5, SHA or RIPEMD
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/32—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
    • H04L9/3247—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials involving digital signatures
    • H04L9/3255—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials involving digital signatures using group based signatures, e.g. ring or threshold signatures
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/50—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols using hash chains, e.g. blockchains or hash trees

Definitions

  • This invention refers to the transfer or transaction of information and, more specifically, to a provider of a blockchain solution; namely, a network of distributed blockchains that validates and distributes blocks of information transaction records that may be encrypted, so that at least one recipient member connected to the blockchain network, is able to decrypt, read, and execute the blocks of transaction records encrypted by the validator or mining nodes in the blockchain network.
  • a private network built around a financial asset may include a plurality of network members such as a service provider; for example, banks, clearing agencies or the like; regulatory institutions, clients, etc., that request the transfer of a financial asset.
  • a service provider processing a transfer of information from a first customer's financial asset would not disclose the content of that transfer of information to unauthorised customers who are not involved in the transfer.
  • each individual system may differ in the level of implemented security.
  • each network can provide different protocols for encryption, authentication, data masking, and the like. Therefore, some systems may be more susceptible to compromise, affecting both the compromised system and the data that other systems have shared with it.
  • the present invention seeks to solve one or more of the above disadvantages by means of a blockchain arrangement with at least one restricted transaction as defined in the claims.
  • the proposed blockchain system provides the capability for anonymity and privacy that are not currently available in other blockchain systems. These two new capabilities are developed as a differentiating element in a unique blockchain, which is shared by all the integrating nodes of a blockchain network.
  • the blockchain network comprises a plurality of participating nodes and validator or mining nodes with a consensus mechanism of evidence of authority.
  • the method provides, to the plurality of validator nodes, the ability to transform a proposed information transaction record block for a restricted transaction from a proposing participant node into a restricted, anonymous information transaction record block that is transmitted to the plurality of destination participating nodes or blockchain nodes of the blockchain network.
  • the receiving validator nodes are configured to transmit blocks with encrypted information transaction records to the destination participating nodes in the blockchain network.
  • the transaction validated by the receiving validator node namely, the mining node, will be transmitted from the receiving validator node to all the destination participating nodes in the blockchain network in the same fashion as a public information transaction record would; that is, inside a block in the blockchain.
  • the validated transaction is encrypted by the receiving validator node so that the participating nodes of the transaction are the only ones able to read and execute it.
  • the blockchain will consist of blocks that will contain indiscriminately public and/or restricted, namely private, information transaction records.
  • a validator node is configured to encrypt the proposed information transaction records from the proposing participating nodes such that the validator node provides restricted information transaction records at the end of the encryption stage.
  • the encrypted information transaction records can only be decrypted and executed by participating nodes in the blockchain network that hold an encryption privacy key corresponding to the privacy group within which the proposed restricted transaction is performed.
  • a privacy group is a subset of nodes in the blockchain network that share at least one encryption privacy key to read the restricted transactions transmitted between nodes in the privacy group.
  • a member of the blockchain network can be part of at least one privacy group and at most can belong to as many privacy groups as different member combinations comprise the blockchain network.
  • a participating node or blockchain node in the blockchain network refers to a physical or legal person who maintains, shares, and operates with his own local copy of the blockchain, namely, a record book or ledger.
  • a member refers to a physical or legal person who performs information transactions and is authorised to access certain information transaction records in the blockchain.
  • the participating nodes will contain a plurality of encryption privacy keys intended to record restricted information transactions within the privacy groups in which they are included.
  • the validator node encrypts a proposed information transaction record from the proposing participant node with the encryption privacy key of a particular privacy group and also marks the encrypted transaction record data block as restricted, following which the created block, comprising an encrypted information transaction record, is assembled into the blockchain for later distribution from the validator nodes to the other nodes that are members of the blockchain network.
  • any member of the privacy group connected to the blockchain network can access the details of certain information transactions included in the newly created block.
  • the participating recipient node decrypts the restricted information transaction records of the created block by using the corresponding encryption privacy key from within its set of encryption privacy keys assigned to each privacy group.
  • the system provides records of restricted or private and public transactions contained in a block that are eventually assembled in the blockchain and distributed uniformly to all network members, providing not only privacy to transactions by encryption, but anonymity because the blocks are distributed only by the validator nodes.
  • All the network members in the blockchain use a unique string or ledger and, therefore, eliminate redundant resources to manage individual systems.
  • Privacy is achieved through encryption because members of the blockchain network can only access the details of the information transactions to which they are entitled; that is, they are members of a portion of nodes or privacy group in the blockchain network.
  • Figure 1 shows a blockchain network in a block diagram comprising a plurality of nodes that are connected through a telecommunications network to simultaneously broadcast or propagate public and private information transaction records from a blockchain.
  • the blockchain is distributed over the telecommunications network, 14, from one validator node, 13, to the rest of nodes,12, 13, of the blockchain network, 11.
  • the telecommunications network, 14, can be a LAN (local area network), wired or wireless, wide area network, WAN, such as an intranet, an extranet, or the Internet, or the like.
  • the telecommunications network, 14, facilitates communications between the nodes, 12, 13, of the blockchain network, 11.
  • Nodes 12 and 13 in the blockchain network, 11, are electronic devices similar to a computer running an operating system.
  • Nodes 12 and 13 that make up the blockchain network, 11, are configured to execute instructions stored on computer-readable storage media.
  • all the nodes, 12, 13, run communication protocols to interact with the services and/or content provided by the blockchain network, 11.
  • All the nodes, 12, 13, in the blockchain network, 11, have read access to the chain data in their own local copy. Only validator or mining nodes, 13, can issue or create new blocks with public and restricted transaction records.
  • One public transaction and/or a restricted transaction namely, will be transmitted from a participating node 12 to other validator nodes for its validation and consensus.
  • the validator node Once the transaction is validated and agreed, the validator node generates a block of data to add to the blockchain. Each data block includes a hash relative to the immediately preceding data block to prevent modification of the previous information.
  • a participating node, 12 proposes a private or restricted transaction
  • the proposed transaction has to be validated by the majority of the validator or mining nodes, 13. This transaction is transmitted to the validator or mining nodes, 13, through a telecommunications network, 14.
  • the receiving validator node, 13, of the restricted transaction execution request determines the participating nodes, 12, according to the members entered in a certain pre-configured privacy group.
  • the request message for executing the restricted transaction also comprises, in addition to the data specific to the proposed transaction, the metadata relating to the privacy context for which the restricted transaction is executed.
  • the proposed restricted transaction is transmissible from the receiving validator node, 13, to at least one or more validator nodes, 13, for its validation and consensus.
  • Each validator node, 13, determines whether a transaction is valid and consistent with the other validation nodes, 13, and if it should be integrated into the next block in the string.
  • the network, 11, of participating nodes, 12, and validators, 13 maintains and manages the chain of data blocks composed simultaneously by public and/or restricted transactions; such that each node, 12, 13, has access to all the data blocks, whether public or restricted information transaction records, even though only the participating nodes, 12, in the particular privacy group have simultaneous access to the restricted transaction and public transactions.
  • a transaction proposed by a participating node, 12, in the blockchain network has a unique identifier that corresponds to the execution of a summary mathematical function such as MD5, a secure hash algorithm, SHA, BLAKE, or other similar hash functions over its binary content. This unique identifier will be called the transaction hash.
  • the proponent participant node, 12 privately sends to all the validator nodes, 13, the contents of the information transaction record t x ', together with the privacy group identifier.
  • the validator nodes, 13, execute the information transaction and, once the information transaction has been validated and agreed by a majority of validator nodes, 13, the information transaction record t x ' is encrypted by an encryption module of the validator node, 13.
  • the encrypted information transaction t x is covered by a new information transaction t x '; so that the information transaction t x ' is forced to maintain the same hash identifier as the information transaction t x .
  • the encrypted data block is marked as a restricted information transaction t x for which only the participating nodes, 12, that have the encrypted privacy key are able to read and execute the restricted information transaction t x .
  • the above process is carried out by the validator node, 13, encryption module.
  • the encrypted and marked data block of the blockchain will be distributed by the validator nodes, 13, of the blockchain network and will comprise 0 to N transactions and at least one information transaction t x '; that is, a block of data that is encrypted and marked as restricted.
  • the participating nodes, 12, in the t x privacy group are further informed that t x ' is a transaction destined for that privacy group.
  • the validator nodes, 13, are enabled upon receipt of the constraint metadata from the participant node, 12, to execute, validate, package, and deliver all the restricted transactions to the participating nodes, 12, belonging to the privacy group.
  • the participating nodes, 12, that wish to perform a restricted information transaction within the privacy group, are configured to decrypt encrypted blocks distributed from the validator nodes, 13, using the corresponding encryption privacy key corresponding to the transaction privacy group.
  • the validator nodes, 13, are configured to perform privacy group management tasks such as distributing a set of encryption privacy keys.
  • a privacy key from the set of encryption privacy keys is used by validator nodes, 13, to encrypt proposed information transactions that have to be encrypted and marked as restricted data blocks before being assembled within a block and, later, distributed to all the nodes, 12, in the blockchain network; that is, to nodes, 12, in the privacy group and to all the other nodes in the blockchain network, 11.
  • a participating node, 12, in the blockchain network can perform a restricted information transaction with at least one specific participating node, 12, in the blockchain network, 11, both participating nodes, 12, in the blockchain network, 11, must belong to the same privacy group.
  • All nodes, 12, in the blockchain network, 11, receive each of the data blocks in the existing blockchain, and then, successively, in a continuous way, the blockchain advances.
  • all nodes, 12, 13, in the blockchain network have the same binary copy of the blockchain stored; namely, distributed record book, ledger, immutable, which includes both the public and private transactions.
  • the participating nodes, 12, and validators, 13, of the blockchain network, 11, comprise at least one input-output interface for communication between the different nodes, 12, 13, of the blockchain network, 11, at least one encryption-decryption module, a privacy group store that comprises at least one participating node, 12, and at least one set of encrypted privacy keys and a blockchain store; namely, distributed record book, ledger.
  • the privacy group store on the participating nodes, 12, will store only the privacy groups in which the participating node, 12, is a member.
  • the privacy group store on the validator nodes, 13 will be the result of the superset of the privacy groups of each node, or the privacy groups that can be formed with the n-1 participating nodes, 12, in the blockchain network, 11.

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  • Engineering & Computer Science (AREA)
  • Business, Economics & Management (AREA)
  • Accounting & Taxation (AREA)
  • Theoretical Computer Science (AREA)
  • Finance (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Security & Cryptography (AREA)
  • Strategic Management (AREA)
  • General Business, Economics & Management (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Databases & Information Systems (AREA)
  • Data Mining & Analysis (AREA)
  • Financial Or Insurance-Related Operations Such As Payment And Settlement (AREA)
  • Storage Device Security (AREA)
  • Information Retrieval, Db Structures And Fs Structures Therefor (AREA)
EP19932269.4A 2019-07-18 2019-07-18 Anordnung von blockchains mit beschränkter transaktion Active EP4036744B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/ES2019/070503 WO2021009390A1 (es) 2019-07-18 2019-07-18 Disposición de cadenas de bloques con una transacción restringida

Publications (4)

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EP4036744A1 true EP4036744A1 (de) 2022-08-03
EP4036744A4 EP4036744A4 (de) 2022-11-30
EP4036744B1 EP4036744B1 (de) 2024-07-10
EP4036744C0 EP4036744C0 (de) 2024-07-10

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US (1) US20210166222A1 (de)
EP (1) EP4036744B1 (de)
JP (1) JP7410060B2 (de)
CN (1) CN112654972B (de)
BR (1) BR112020025811A2 (de)
CA (1) CA3103884C (de)
ES (1) ES2992115T3 (de)
IL (1) IL279523B2 (de)
MX (1) MX2020014099A (de)
PL (1) PL4036744T3 (de)
SG (1) SG11202012781YA (de)
WO (1) WO2021009390A1 (de)
ZA (1) ZA202007897B (de)

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CN118364492B (zh) * 2024-05-10 2025-07-22 山东大学 一种基于区块链与隐私计算的数据可信交易方法及系统

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JP2020521342A (ja) * 2019-03-29 2020-07-16 アリババ・グループ・ホールディング・リミテッドＡｌｉｂａｂａ Ｇｒｏｕｐ Ｈｏｌｄｉｎｇ Ｌｉｍｉｔｅｄ ブロックチェーンネットワークにおける機密データ要素の管理

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Publication number Publication date
JP2022548185A (ja) 2022-11-17
EP4036744B1 (de) 2024-07-10
MX2020014099A (es) 2021-04-13
EP4036744A4 (de) 2022-11-30
CA3103884A1 (en) 2021-01-18
EP4036744C0 (de) 2024-07-10
SG11202012781YA (en) 2021-07-29
IL279523A (en) 2021-03-25
US20210166222A1 (en) 2021-06-03
CA3103884C (en) 2025-02-11
BR112020025811A2 (pt) 2021-03-23
CN112654972B (zh) 2025-10-03
JP7410060B2 (ja) 2024-01-09
IL279523B1 (en) 2024-08-01
WO2021009390A1 (es) 2021-01-21
ZA202007897B (en) 2022-04-28
ES2992115T3 (es) 2024-12-09
IL279523B2 (en) 2024-12-01
PL4036744T3 (pl) 2024-11-18
CN112654972A (zh) 2021-04-13

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